Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

With no annotations, the description carries the full burden. It does disclose a real behavioral trait beyond structured data — an API key is required — and that results are score-sorted. However it says nothing about whether the operation is read-only, what the scores mean, or limits on result count.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

A single front-loaded sentence stating the core mechanism, with the API key prerequisite parenthetically attached. The requirement is needlessly stated twice ("需 key" and "需 API Key"), which is minor redundancy but not bloat.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a zero-parameter tool with no output schema and no annotations, the description covers the mechanism and the auth prerequisite, which is the essential information. Yet with no parameters or output schema to lean on, the description could reasonably explain the score scale or result ordering semantics and does not.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

The tool takes zero parameters and the schema is empty at 100% coverage, so the baseline of 4 applies. There are no parameters for the description to clarify.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

States a specific verb+resource: computes complementary member matches via a bidirectional give/want intersection, with score ranking. This is meaningfully more precise than a generic 'match' name, though it never contrasts itself against sibling tools like soloteam_directory or soloteam_member.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

The only usage information is a repeated prerequisite ("需 key" / "需 API Key"). There is no guidance on when to prefer this over soloteam_directory or soloteam_member, nor when it should not be used. Prerequisite disclosure alone is not usage guidance.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.